From 4f7d536ed375d6aafc7cc5971dc51a7bc4a021fb Mon Sep 17 00:00:00 2001 From: Duncan Laurie Date: Tue, 16 May 2017 19:04:16 -0700 Subject: mb/google/eve: Update touchpad I2C timing The touchpad frequency was still slightly above 400kHz so tweak the timing values manually to get under the spec limit. BUG=b:35583133 TEST=verified the bus frequency with a scope to be < 400kHz Change-Id: I8bd071a8e15a791b7551ac256797e87abd6b5e5a Signed-off-by: Duncan Laurie Reviewed-on: https://review.coreboot.org/19727 Reviewed-by: Aaron Durbin Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel --- src/mainboard/google/eve/devicetree.cb | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/src/mainboard/google/eve/devicetree.cb b/src/mainboard/google/eve/devicetree.cb index 1305f9cb51..97ae3c7ca5 100644 --- a/src/mainboard/google/eve/devicetree.cb +++ b/src/mainboard/google/eve/devicetree.cb @@ -182,8 +182,12 @@ chip soc/intel/skylake register "i2c_voltage[2]" = "I2C_VOLTAGE_1V8" register "i2c[2]" = "{ .speed = I2C_SPEED_FAST, - .rise_time_ns = 111, - .fall_time_ns = 41, + .speed_config[0] = { + .speed = I2C_SPEED_FAST, + .scl_lcnt = 186, + .scl_hcnt = 93, + .sda_hold = 36, + } }" # Audio -- cgit v1.2.3